chore(points): 移除已废弃的 erp-points crate + 注释空桩和死常量

- 删除 erp-points/ 目录（全部 501 handler，功能由 erp-health 完整提供）
- 从 workspace Cargo.toml 和 erp-server 依赖中移除
- erp-dialysis event.rs: 说明事件由 erp-health 统一消费的设计意图
- erp-health event.rs: 标记 PATIENT_VERIFIED/PATIENT_DECEASED 为待实现

crates/erp-health/src/event.rs

@@ -47,6 +47,7 @@ pub const HEALTH_DATA_CRITICAL_ALERT: &str = "health_data.critical_alert";
 // 患者
 pub const PATIENT_CREATED: &str = "patient.created";
 pub const PATIENT_UPDATED: &str = "patient.updated";
+// TODO: 以下常量对应的患者认证和死亡记录流程尚未实现，待后续迭代
 pub const PATIENT_VERIFIED: &str = "patient.verified";
 pub const PATIENT_DECEASED: &str = "patient.deceased";